#24398C
Closest named color: Cobalt (#1E488F). oklch(38.2% 0.14 268.2), rgb(36, 57, 140).
Aa
White text reads best on this color (10.29:1).
About this color
#24398C is a dark, vivid blue. In OKLCH its lightness is 38%, its chroma 0.140 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.040 away. White text reads best on it, at 10.29:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.03:1 |
| White text | 10.29:1 |
Values
| HEX | #24398C |
| RGB | rgb(36, 57, 140) |
| HSL | hsl(228, 59%, 35%) |
| OKLCH | oklch(38.2% 0.14 268.2) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #24398C | 10.29:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #24398C | 2.03:1 | Fails | Lc 10.5 | Not readable |
| #24398C text on white | 10.29:1 | AAA | Lc 93.4 | Preferred for body text |
| #24398C text on black | 2.03:1 | Fails | Lc -9.1 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 900.
-
Step 50
50
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A6BFFF
oklch(80.9% 0.095 267.8)
-
Step 400
400
#789AFF
oklch(70.6% 0.153 268.3)
-
Step 500
500
#577DFF
oklch(63.1% 0.197 268)
-
Step 600
600
#3C5EF9
oklch(55.7% 0.233 268)
-
Step 700
700
#304BD9
oklch(49% 0.218 268.3)
-
Step 800
800
#273FAF
oklch(42.6% 0.18 268.1)
-
Step 900
900 (this color)
#24398C
oklch(38.2% 0.14 268.2)
-
Step 950
950
#142251
oklch(27.1% 0.088 267.6)
#24398C with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #00458F | 0.035 |
| Deuteranopia (no green cones) | #003C8A | 0.025 |
| Tritanopia (no blue cones) | #004E5C | 0.114 |
| Achromatopsia (no color) | #404040 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #24398C
#24398C
oklch(38.2% 0.14 268.2)
- #544000
#544000
oklch(38.2% 0.078 88.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #24398C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.040
- Twilight Blue #0A437A ΔE 0.046
- Sapphire #2138AB ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.055
- Blueberry #464196 ΔE 0.057
- Marine Blue #01386A ΔE 0.066
- Light Navy #155084 ΔE 0.067
- Dusk Blue #26538D ΔE 0.073
Use #24398C in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.